SELECT @@wsrep_on;
@@wsrep_on
0
SET @wsrep_slave_threads_global_saved = @@global.wsrep_slave_threads;
SET @wsrep_debug_saved = @@global.wsrep_debug;
SET SESSION wsrep_trx_fragment_size=DEFAULT;
ERROR HY000: Incorrect arguments to SET
SELECT @@session.wsrep_trx_fragment_size;
@@session.wsrep_trx_fragment_size
0
SET GLOBAL wsrep_start_position='12345678-1234-1234-1234-123456789012:100';
ERROR 42000: Variable 'wsrep_start_position' can't be set to the value of '12345678-1234-1234-1234-123456789012:100'
SHOW WARNINGS;
Level	Code	Message
Warning	1231	Cannot set 'wsrep_start_position' because wsrep is switched off or provider is not loaded
Error	1231	Variable 'wsrep_start_position' can't be set to the value of '12345678-1234-1234-1234-123456789012:100'
SELECT @@global.wsrep_start_position;
@@global.wsrep_start_position
00000000-0000-0000-0000-000000000000:-1
SET GLOBAL wsrep_debug=1;
Warnings:
Warning	1231	Setting 'wsrep_debug' has no effect because wsrep is switched off
SELECT @@global.wsrep_debug;
@@global.wsrep_debug
NONE
SET GLOBAL wsrep_slave_threads=5;
SELECT @@global.wsrep_slave_threads;
@@global.wsrep_slave_threads
5
SET GLOBAL wsrep_desync=1;
ERROR HY000: WSREP (galera) not started
SELECT @@global.wsrep_desync;
@@global.wsrep_desync
0
SET SESSION wsrep_trx_fragment_unit='rows';
ERROR HY000: Incorrect arguments to SET
SELECT @@session.wsrep_trx_fragment_unit;
@@session.wsrep_trx_fragment_unit
rows